package org.example.big_event.interceptors;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.example.big_event.utils.JwtUtil;
import org.example.big_event.utils.ThreadLocalUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;
@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//        令牌验证
        String token = request.getHeader("Authorization");
//        验证token
        try {
            //获取redis中相同的token
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            String redisToekn = operations.get(token);
            if (redisToekn == null) {
                throw new RuntimeException();
            }
            Map<String, Object>  claims= JwtUtil.parseToken(token);
//            把业务数据存储到ThreadLocal中
            ThreadLocalUtil.set(claims);
//            拦截器放行
            return true;
        } catch (Exception e) {
            response.setStatus(401);
//            拦截
            return false;
        }
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        ThreadLocalUtil.remove();
    }
}
